Heavier mass or softer spring → more extension. Hit “Release to oscillate” for simple harmonic motion and the PE↔KE energy trade.
▶ Release to oscillate
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Options
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Presets
Soft spring
Stiff spring
Heavy mass
Bungee
Hanging mass m
1.0 kg
Spring constant k
40 N/m
Gravity
Earth — 9.81 m/s²
Moon — 1.62 m/s²
Jupiter — 24.8 m/s²
Extension x
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Force F = mg
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Spring constant k
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Elastic PE = ½kx²
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Period T = 2π√(m/k)
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Hooke's Law Simulator ↗ LK Forge
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